Funding for this research was provided by:
the National Natural Science Foundation of China (11872340)
the National Natural Science Foundation of China under the grant number (11602006)
the Fundamental Research Funds for the Central Universities, China University of Geosciences (CUG170657)
Article History
Received: 22 February 2019
Revised: 17 June 2019
Accepted: 30 August 2019
First Online: 16 September 2019